package yuntikutest;

import java.util.ArrayList;
import java.util.List;

public class ArrayListDemo {

	public static void main(String[] args) {
		List al = new ArrayList(100);
		System.out.println(al.size());
		al.add("今天天气真好");
		al.add(100);
		al.add(12.4);
		System.out.println(al);
	}
}
